Algorithm research of generating S-box based on chaotic system

S-boxes are the only nonlinear components in many encryption algorithms, whose intension decides the security strength of the whole algorithm. By theoretical analysis and statistic tests, there is evidence showing that large S-boxes have better cryptographic properties than small ones. But they are harder to design and implement. Now the 8x8 S-box is popular.. This paper proposes a dynamic S box generation algorithm based on chaotic maps. Theoretical analysis and statistic tests show that designed S-boxes have sound linear probability and differential probability. These S-boxes offer the nonlinear resouce for further design of cryptographic algorithms.